The Department of Homeland Security appears to have shut down the ability to use Dwolla, a mobile payment service, to withdraw and deposit money into Mt. Gox, a Bitcoin trading platform. A Dwolla representative confirmed the move to Betabeat. Chris Coyne, cofounder of OKCupid, posted a screenshot of an email he received from Dwolla, stating that due to recent orders from the Department of Homeland Security, Dwolla cannot complete the bank transfer to Mt. Gox.